Layered Double Zinc and Aluminum Hydroxide Intercalated with Hexacyanoferrate(II) Ions for Extraction of U(VI) from Liquid Media

Layered double zinc and aluminum hydroxide modified with hexacyanoferrate(II) ions was synthesized for the first time by reverse deposition. The obtained samples were studied by X-ray phase analysis, scanning electron microscopy, and low-temperature nitrogen adsorption, and their sorption characteristics with respect to uranium U(VI) were studied. The sorption capacity for the modified material under static conditions, determined by the Langmuir equation, was q(max)(l) = 156.70 +/- 12.38 mg/g (at phase ratio V/m = 1000 mL/g, in a monocomponent solution of uranyl nitrate UO2(NO3)(2) at a temperature T = 25 degrees C and sorption time t = 24 h). Layered double zinc and aluminum hydroxide modified with hexacyanoferrate(II) ions is a promising sorbent for purification of liquid media from uranium U(VI) due to its high capacity and specific surface area, the possibility of effective use in a wide range of pH [4, 10], and low cost.